CN105269176A - Gas-shielded flux-cored wire for oil tank corrosion resistant steel and preparation method for gas-shielded flux-cored wire - Google Patents
Gas-shielded flux-cored wire for oil tank corrosion resistant steel and preparation method for gas-shielded flux-cored wire Download PDFInfo
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- CN105269176A CN105269176A CN201510813263.9A CN201510813263A CN105269176A CN 105269176 A CN105269176 A CN 105269176A CN 201510813263 A CN201510813263 A CN 201510813263A CN 105269176 A CN105269176 A CN 105269176A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/406—Filled tubular wire or rods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
Abstract
The invention discloses a gas-shielded flux-cored wire for oil tank corrosion resistant steel and a preparation method for the gas-shielded flux-cored wire. The gas-shielded flux-cored wire for oil tank corrosion resistant steel is composed of low-carbon steel sheath and a flux core which is wrapped in the low-carbon steel sheath, wherein the flux core is prepared from the following components in parts by weight: 3-5 parts of rutile, 1-2 parts of ferrosilicon power, 0.2-0.5 part of ferrotitanium powder, 0.15-0.3 part of fluoride, 0.2-0.5 part of ferro-manganese powder, 0.2-0.3 part of nickel powder, 0.1-0.15 part of copper powder, 0.2-0.8 part of tungsten powder, 0.3-0.6 part of stibium powder, and 5.55-11.2 parts of iron powder. Compared with prior art, the welding process is stable in performance, stable in electric arc, small in splashing, attractive in welding seam forming, and the like; and the gas-shielded flux-cored wire achieves good mechanical property and corrosion resistance.
Description
Technical field
The present invention relates to a kind of welding material, particularly a kind of gas shielded flux cored wire and preparation method thereof of the steel of resistance to cargo tank corrosion.
Background technology
Japan just starts the research to corrosion resisting steel in last century Mo.Go through 3 years, successfully disclose oil cargo tank internal corrosion, corrode the mechanism and corrosion process that produce, establish oil carrier oil cargo tank emulation test method.2002, the iron and steel manufacturer of Japan, based on above-mentioned achievement in research, started to research and develop this novel corrosion resisting steel, and obtains engineer applied.The actual loading test of Japan shows, this kind of steel have good corrosion resistance on the deck of oilburg with at interior the end, and the rate of corrosion after two-and-a-half years is 1/4th of common iron.The ultra-large type crude oil carrier cargo hold inner shell bottom that NYK company of Japan ordered in recent years has employed this corrosion resisting steel, instead of corrosion-inhibiting coating.Dubai can be gone up, and outpost display Mitsubishi Heavy Industries Ltd build the ship of a TAKAMING by name of completion in June, 2004.The inner shell bottom of this ship employs anti-corrosion steel plate, and deck and other positions still use conventional ship plate.Ballast tank, according to the requirements of convention of IMO, employs corrosion-inhibiting coating.The mammoth tanker that " CNOOC " builds at present all adopts corrosion-inhibiting coating, and the operation through 5 or six years proves that our coating technology is ripe.Empirical evidence, whether a kind of antiseptic effect is good, at least needs in a decade or so.Because ferrous materials is varied, propose various requirement to the application of steel, the rate of corrosion of shell and off-shore structure steel plate also relates to the corrosion resistance of steel.But the corrosivity of shell and off-shore structure surrounding environment is eager to excel, the corrosivity under high-temperature steam and generator environment is stronger.Because the corrosion phenomenon in environment is very general, the requirement of resistant material is not quite similar, therefore will develops the steel products meeting environmental requirement.
Anti-corrosion steel plate is widely used, and increases year by year the demand of anti-corrosion steel plate.Therefore, there is the stainless steel of good corrosion resistance and be coated with steel plating and develop.Particularly not only require that ferrous materials has corrosion resistance in recent years, and meet other performances, as deep drawing quality, coating adhesiveness and weldability.
But these anti-corrosion steel plates lack the corresponding wlding matched, and common same level steel cannot meet corrosion resistant requirement, after steel plate is corroded, can bring great potential safety hazard.
Summary of the invention
An object of the present invention is just the gas shielded flux cored wire providing a kind of steel of resistance to cargo tank corrosion, and the gas shielded flux cored wire welding technological properties of this steel of resistance to cargo tank corrosion is good, arc stability, little, the object such as appearance of weld is attractive in appearance of splashing; Performance reaches good mechanical property and the object of corrosion resistance.
Technical scheme is: a kind of gas shielded flux cored wire of the steel of resistance to cargo tank corrosion, and be made up of mild steel crust and the medicine core being wrapped in the outer intracutaneous of this mild steel, this medicine core is made up of following composition:
Rutile 3-5 weight portion
Ferrosilicon powder 1-2 weight portion
Titanium-iron powder 0.2-0.5 weight portion
Fluoride 0.15-0.3 weight portion
Ferromanganese powder 0.2-0.5 weight portion
Nickel powder 0.2-0.3 weight portion
Copper powder 0.1-0.15 weight portion
Tungsten powder 0.2-0.8 weight portion
Antimony powder 0.3-0.6 weight portion and
Iron powder 5.55-11.2 weight portion.
As preferably, described mild steel crust is the steel band of 4 × 0.9mm, and chemical composition is C0.025wt%, Mn0.22wt%, Si0.018wt%, S0.008wt%, P0.01wt%, surplus are iron.
As preferably, described medicine core weight is the 10-20wt% of welding wire weight.
As preferably, described rutile is 4.5 weight portions, ferrosilicon powder is 2.0 weight portions, and titanium-iron powder is 0.5 weight portion, and fluoride is 0.2 weight portion, ferromanganese powder is 0.4 weight portion, nickel powder is 0.3 weight portion, and copper powder is 0.15 weight portion, and tungsten powder is 0.8 weight portion, antimony powder is 0.6 weight portion, and iron powder is 5.55 weight portions.
As preferably, described rutile is 5.0 weight portions, ferrosilicon powder is 1.5 weight portions, and titanium-iron powder is 0.4 weight portion, and fluoride is 0.3 weight portion, ferromanganese powder is 0.5 weight portion, nickel powder is 0.2 weight portion, and copper powder is 0.10 weight portion, and tungsten powder is 0.5 weight portion, antimony powder is 0.3 weight portion, and iron powder is 11.2 weight portions.
As preferably, described rutile is 3.0 weight portions, ferrosilicon powder is 1.0 weight portions, and titanium-iron powder is 0.2 weight portion, and fluoride is 0.15 weight portion, ferromanganese powder is 0.2 weight portion, nickel powder is 0.3 weight portion, and copper powder is 0.1 weight portion, and tungsten powder is 0.2 weight portion, antimony powder is 0.5 weight portion, and iron powder is 9.35 weight portions.
Two of object of the present invention is the preparation method of the gas shielded flux cored wire providing a kind of steel of resistance to cargo tank corrosion.
Technical scheme is: a kind of preparation method of gas shielded flux cored wire of the steel of resistance to cargo tank corrosion, comprises the following steps:
1. composition each in medicine core is mixed rear stand-by;
2. steel band to be placed in welding wire forming machine, stand-by medicine core compound to be injected laterally be bent in the steel band groove of " U " type successively, and then roll into silk, through being carefully pulled to ￠ 1.2mm.
Two of object of the present invention is the welding method providing a kind of steel of resistance to cargo tank corrosion.
Technical scheme is: a kind of welding method of the steel of resistance to cargo tank corrosion, and described welding method adopts the steel of resistance to cargo tank corrosion described in gas shielded flux cored wire welding of the above-mentioned steel of resistance to cargo tank corrosion.
Inventive principle:
Ferrosilicon: the alloying constituent that silicon to be important deoxidier be also simultaneously weld metal is important, in weld seam, add silicon, oxygen content in weld metal can be made to reduce, and acicular ferrite quantity increases the oxygen content that silicon can reduce weld metal, improve the impact flexibility of weld metal, but then contrary time too high; Adopt its effect of silicomanganese combined deoxidation better.
Rutile: main chemical compositions is titanium oxide (TiO2), mainly as arc stabilizer, slag former in welding rod, ensures that weld joint stable electric arc is careful with shaping.
Nickel: nickel, as inovulant, crystal grain thinning, reduces segregation, promotes the formation of acicular ferrite, thus improves ferritic toughness.Nickel also increases dislocation energy, and during promotion low temperature, screw dislocation commutative Banach aglebra, increases Crack Extension consumed work, also make toughness improve, be mainly derived from metallic nickel.
Fluoride: fluorine is in order to reduce the content of Diffusible Hydrogen In Deposited Metal, but content of fluoride is too high, during welding, electric arc is unstable, splashing becomes large, arcing sounds is deteriorated, and is mainly derived from sodium fluoride, prodan, potassium fluosilicate or oryolite.
Copper powder: add the decay resistance that copper powder can improve deposited metal in medicine core.
Tungsten powder: add the decay resistance that tungsten powder can improve deposited metal in medicine core.
Antimony powder: add the decay resistance that antimony powder can improve deposited metal in medicine core.
Beneficial effect:
The present invention by organic assembly of above-mentioned drug core component and coordinate with mild-carbon steel strip crust thus realize welding wire weld after deposited metal: tensile strength 490-623Mpa, yield strength >=355Mpa, percentage elongation >=21% ,-20 DEG C of impacts reach 80J,-40 DEG C of impacts reach 54J, and deposited metal diffusible hydrogen content is less than 5mL/100g.Effectively improve weld seam overall performance, solve the problem of weld metal low-temperature flexibility deficiency and corrosion resistance.Welding technological properties is good, arc stability, splash little, appearance of weld is attractive in appearance.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further illustrated.
Embodiment 1
Adopt the steel band of (wide × thick) (14 × 0.9) mm as the crust of welding wire, its chemical composition is C0.025wt%, Mn0.22wt%, Si0.018wt%, S0.008wt%, P0.01wt%, surplus be iron; 100Kg welding wire is produced to prepare, the present embodiment medicine core accounts for the heavy 15wt% of whole welding wire, and in medicine core, each composition is: rutile 4.5kg, ferrosilicon powder: 2.0kg, titanium-iron powder: 0.5kg, fluoride: 0.2kg, ferromanganese powder: 0.4kg, nickel powder: 0.3kg, copper powder: 0.15kg, tungsten powder: 0.8kg, antimony powder: 0.6kg and iron powder 5.55Kg; Then composition each in medicine core is mixed rear stand-by;
Steel band to be placed in welding wire forming machine, stand-by medicine core compound to be injected laterally be bent in the steel band groove of " U " type successively, and then roll into silk, through being carefully pulled to ￠ 1.2mm.
Test mother metal adopts the WNS36E (COT steel) of Wuyang steel plant refining, and the present embodiment is in welding parameter: I=230-250A, U=28-30V, gas flow 20L/min, 100%CO
2.
Deposited metal composition (wt%)
| C | Mn | Si | S | P | Cr | Ni | Cu | W | Sb |
| 0.050 | 0.92 | 0.27 | 0.0050 | 0.014 | 0.024 | 0.43 | 0.17 | 0.08 | 0.04 |
Surplus is Fe and impurity
Deposited metal mechanical performance (80%Ar+20%CO
2):
Diffusible hydrogen content: 3.5mL/100g
Embodiment 2
The crust of welding wire is identical with embodiment 1,100Kg welding wire is produced to prepare, the present embodiment medicine core accounts for the heavy 20wt% of whole welding wire, and in medicine core, each composition is: rutile 5.0kg, ferrosilicon powder: 1.5kg, titanium-iron powder: 0.4kg, fluoride: 0.3kg, ferromanganese powder: 0.5kg, nickel powder: 0.2kg, copper powder: 0.10kg, tungsten powder: 0.5kg, antimony powder: 0.3kg and iron powder 11.2kg; Then composition each in medicine core is mixed that rear stand-by all the other are identical with embodiment 1.
Deposited metal composition (wt%)
| C | Mn | Si | S | P | Cr | Ni | Cu | W | Sb |
| 0.052 | 0.85 | 0.22 | 0.006 | 0.012 | 0.026 | 0.85 | 0.20 | 0.12 | 0.11 |
Surplus is Fe and impurity
Deposited metal mechanical performance (mist):
Diffusible hydrogen content: 4.0mL/100g
Embodiment 3
The crust of welding wire is identical with embodiment 1,100Kg welding wire is produced to prepare, the present embodiment medicine core accounts for the heavy 10wt% of whole welding wire, and in medicine core, each composition is: rutile 3.0kg, ferrosilicon powder: 1.0kg, titanium-iron powder: 0.2kg, fluoride: 0.15kg, ferromanganese powder: 0.2kg, nickel powder: 0.3kg, copper powder: 0.1kg, tungsten powder: 0.2kg, antimony powder: 0.5kg and iron powder 9.35kg; Then composition each in medicine core is mixed that rear stand-by all the other are identical with embodiment 1.
Deposited metal composition (wt%)
| C | Mn | Si | S | P | Cr | Ni | Cu | W | Sb |
| 0.055 | 0.55 | 0.21 | 0.007 | 0.013 | 0.026 | 0.44 | 0.22 | 0.03 | 0.03 |
Surplus is Fe and impurity
Deposited metal mechanical performance (mist)
Diffusible hydrogen content: 4.2mL/100g.
Claims (8)
1. a gas shielded flux cored wire for the steel of resistance to cargo tank corrosion, be made up of mild steel crust and the medicine core being wrapped in the outer intracutaneous of this mild steel, this medicine core is made up of following composition:
Rutile 3-5 weight portion
Ferrosilicon powder 1-2 weight portion
Titanium-iron powder 0.2-0.5 weight portion
Fluoride 0.15-0.3 weight portion
Ferromanganese powder 0.2-0.5 weight portion
Nickel powder 0.2-0.3 weight portion
Copper powder 0.1-0.15 weight portion
Tungsten powder 0.2-0.8 weight portion
Antimony powder 0.3-0.6 weight portion and
Iron powder 5.55-11.2 weight portion.
2. the gas shielded flux cored wire of the steel of resistance to cargo tank corrosion according to claim 1; it is characterized in that: described mild steel crust is the steel band of 4 × 0.9mm, chemical composition is C0.025wt%, Mn0.22wt%, Si0.018wt%, S0.008wt%, P0.01wt%, surplus be iron.
3. the gas shielded flux cored wire of the steel of resistance to cargo tank corrosion according to claim 1, is characterized in that: described medicine core weight is the 10-20wt% of welding wire weight.
4. the gas shielded flux cored wire of the steel of resistance to cargo tank corrosion according to claim 1; it is characterized in that: described rutile is 4.5 weight portions; ferrosilicon powder is 2.0 weight portions, and titanium-iron powder is 0.5 weight portion, and fluoride is 0.2 weight portion; ferromanganese powder is 0.4 weight portion; nickel powder is 0.3 weight portion, and copper powder is 0.15 weight portion, and tungsten powder is 0.8 weight portion; antimony powder is 0.6 weight portion, and iron powder is 5.55 weight portions.
5. the gas shielded flux cored wire of the steel of resistance to cargo tank corrosion according to claim 1; it is characterized in that: described rutile is 5.0 weight portions; ferrosilicon powder is 1.5 weight portions, and titanium-iron powder is 0.4 weight portion, and fluoride is 0.3 weight portion; ferromanganese powder is 0.5 weight portion; nickel powder is 0.2 weight portion, and copper powder is 0.10 weight portion, and tungsten powder is 0.5 weight portion; antimony powder is 0.3 weight portion, and iron powder is 11.2 weight portions.
6. the gas shielded flux cored wire of the steel of resistance to cargo tank corrosion according to claim 1; it is characterized in that: described rutile is 3.0 weight portions; ferrosilicon powder is 1.0 weight portions, and titanium-iron powder is 0.2 weight portion, and fluoride is 0.15 weight portion; ferromanganese powder is 0.2 weight portion; nickel powder is 0.3 weight portion, and copper powder is 0.1 weight portion, and tungsten powder is 0.2 weight portion; antimony powder is 0.5 weight portion, and iron powder is 9.35 weight portions.
7. prepare a method for the gas shielded flux cored wire of the steel of resistance to cargo tank corrosion described in the arbitrary claim of claim 1 to 6, comprise the following steps:
1. composition each in medicine core is mixed rear stand-by;
2. steel band to be placed in welding wire forming machine, stand-by medicine core compound to be injected laterally be bent in the steel band groove of " U " type successively, and then roll into silk, through being carefully pulled to ￠ 1.2mm.
8. a welding method for the steel of resistance to cargo tank corrosion, is characterized in that: described welding method adopts the steel of resistance to cargo tank corrosion described in gas shielded flux cored wire welding of the steel of resistance to cargo tank corrosion described in the arbitrary claim of claim 1-6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510813263.9A CN105269176B (en) | 2015-11-20 | 2015-11-20 | Gas shielded flux cored wire for the steel of resistance to cargo tank corrosion and preparation method thereof |
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| CN201510813263.9A CN105269176B (en) | 2015-11-20 | 2015-11-20 | Gas shielded flux cored wire for the steel of resistance to cargo tank corrosion and preparation method thereof |
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| CN105269176B CN105269176B (en) | 2017-12-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110560681A (en) * | 2019-09-25 | 2019-12-13 | 华中科技大学 | Metal type powder core wire material, preparation method and application |
| CN110640352A (en) * | 2019-11-13 | 2020-01-03 | 四川大西洋焊接材料股份有限公司 | Flux-cored wire for Q500qENH coating-free bridge steel and preparation method thereof |
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2015
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| JP2003213367A (en) * | 2001-11-19 | 2003-07-30 | Nippon Steel Corp | Low alloy steel having excellent hydrochloric acid- corrosion and sulfuric acid-corrosion resistance and welded joint thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110560681A (en) * | 2019-09-25 | 2019-12-13 | 华中科技大学 | Metal type powder core wire material, preparation method and application |
| CN110640352A (en) * | 2019-11-13 | 2020-01-03 | 四川大西洋焊接材料股份有限公司 | Flux-cored wire for Q500qENH coating-free bridge steel and preparation method thereof |
| CN110640352B (en) * | 2019-11-13 | 2021-09-03 | 四川大西洋焊接材料股份有限公司 | Flux-cored wire for Q500qENH coating-free bridge steel and preparation method thereof |
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| CN105269176B (en) | 2017-12-12 |
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